JP2007159237A - Geared stepping motor - Google Patents

Geared stepping motor Download PDF

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JP2007159237A
JP2007159237A JP2005349539A JP2005349539A JP2007159237A JP 2007159237 A JP2007159237 A JP 2007159237A JP 2005349539 A JP2005349539 A JP 2005349539A JP 2005349539 A JP2005349539 A JP 2005349539A JP 2007159237 A JP2007159237 A JP 2007159237A
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Prior art keywords
stepping motor
planetary gear
reduction
unit
gear reduction
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JP2005349539A
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JP4891600B2 (en
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Kazuo Tanabe
一夫 田部
Takahiro Funayama
崇博 舩山
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Nidec Precision Corp
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Nidec Copal Corp
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Priority to JP2005349539A priority Critical patent/JP4891600B2/en
Priority to CN2006101639427A priority patent/CN1976174B/en
Priority to KR1020060120116A priority patent/KR101121233B1/en
Priority to TW095144845A priority patent/TWI393328B/en
Publication of JP2007159237A publication Critical patent/JP2007159237A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/46—Systems consisting of a plurality of gear trains each with orbital gears, i.e. systems having three or more central gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Retarders (AREA)
  • General Details Of Gearings (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a geared stepping motor that saves on a space while achieving size reduction, and is suitable for the promotion of the size reduction of an apparatus that is scheduled to be assembled. <P>SOLUTION: Accurate rotational angle control becomes available without the need for utilizing a rotational angle sensor such as a photosensor by employing a steeping motor part 11. A space is saved on while achieving the size reduction by placing the stepping motor part 11 and a planetary gear reduction part 31 in a box 30 in parallel with each other, and the size reduction of the mobile communication apparatus or the like is promoted. By connecting a first flat gear 50 arranged at a rotating shaft 16 of the stepping motor part 11 and a second gear 51 arranged at a rotating shaft 32a of the planetary gear reduction part 31 by a reduction two-stage flat gear 53, gear reduction also becomes available at a part other than the planetary gear reduction part 31. The number of reduction stages, or a reduction rate in the planetary gear reduction part is reduced, thus contributing to the size reduction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、モバイル通信装置、特に、カメラ付き携帯電話やＰＤＡ（Personal Digital Assistance）の電動ヒンジやカメラ回転部を駆動させるために利用される小型のギヤドステッピングモータに関するものである。   The present invention relates to a mobile communication device, and more particularly to a small geared stepping motor used to drive a camera-equipped mobile phone, an electric hinge of a PDA (Personal Digital Assistance), and a camera rotating unit.

従来、カメラ付き携帯電話のカメラ回転部の駆動に利用されるギヤドモータとしては、特開２００４−３２０７８２号公報がある。この公報に記載されたギヤドモータは、ＤＣモータ部に遊星歯車が連結されており、モータ部の駆動軸とケースから突出する出力軸とが同一直線状に配置されている。これによって、細長いギヤドモータが達成されている。そして、カメラ回転部を手でも回せるようにするため、カメラ回転部とギヤドモータの出力軸とは、直接連結されておらず、半球状の凹部と凸部との嵌合によって連結されている。したがって、電動によってカメラ回転部を回転させるときには、半球状の凹凸が嵌合した状態でカメラ回転部が回転する。これに対して、手でカメラ回転部を回す場合には、隣接する凹部内に凸部が順次嵌り込むようにして、カメラ回転部を１クリックずつ回すことができる。   Conventionally, as a geared motor used for driving a camera rotation unit of a camera-equipped mobile phone, there is JP-A-2004-320782. In the geared motor described in this publication, a planetary gear is connected to a DC motor portion, and a drive shaft of the motor portion and an output shaft protruding from the case are arranged in the same straight line. This achieves an elongated geared motor. And in order to be able to rotate a camera rotation part also by hand, the camera rotation part and the output shaft of a geared motor are not connected directly, but are connected by the fitting of a hemispherical recessed part and a convex part. Therefore, when the camera rotation unit is rotated electrically, the camera rotation unit rotates with the hemispherical unevenness fitted. On the other hand, when the camera rotation unit is rotated by hand, the camera rotation unit can be rotated one click at a time so that the convex portions are sequentially fitted in the adjacent concave portions.

特開２００４−３２０７８２号公報JP 2004-320782 A 特開２００４−１９４２６７号公報JP 2004-194267 A

しかしながら、前述のＤＣモータ部によってカメラ回転部を任意の角度で停止させる場合、モータ部の回転角度を検知するためのセンサやトルクリミッタを付加する必要があり、その結果、ギヤドモータが大型化する。従って、このことは、省スペース化を阻害し、小型化が要求されているモバイル通信機器等では不利になっている。さらに、モータ部の駆動軸とケースから突出する出力軸とが同一直線状に配置されているので、ギヤドモータ自体が長くなり、モバイル通信機器特に携帯電話でその幅寸法を短くする際に支障になっていた。   However, when the camera rotation unit is stopped at an arbitrary angle by the DC motor unit described above, it is necessary to add a sensor or a torque limiter for detecting the rotation angle of the motor unit, and as a result, the geared motor is increased in size. Therefore, this hinders space saving and is disadvantageous for mobile communication devices that are required to be downsized. Furthermore, since the drive shaft of the motor unit and the output shaft protruding from the case are arranged in the same straight line, the geared motor itself becomes longer, which hinders the reduction of the width dimension of mobile communication devices, particularly mobile phones. It was.

本発明は、特に、小型化を図りつつ省スペース化を可能にし、組込みが予定されている機器の小型化を促進させるのに適したギヤドステッピングモータを提供することを目的とする。   In particular, an object of the present invention is to provide a geared stepping motor that enables space-saving while achieving miniaturization and is suitable for promoting the miniaturization of a device that is scheduled to be incorporated.

本発明に係るギヤドステッピングモータは、回転軸が所定角度でステップするステッピングモータ部と、ステッピングモータ部の回転軸の回転軸線に対して並設された回転軸線を有する遊星ギア減速部と、ステッピングモータ部の回転軸に設けられた第１の平歯車と遊星ギア減速部の回転軸に設けられた第２の平歯車とを連結する減速２段平歯車と、ステッピングモータ部と遊星ギア減速部とを並置して収容する筐体と、を備えたことを特徴とする。   A geared stepping motor according to the present invention includes a stepping motor unit in which a rotation shaft steps at a predetermined angle, a planetary gear reduction unit having a rotation axis lined in parallel with the rotation axis of the rotation shaft of the stepping motor unit, and a stepping motor A reduction two-stage spur gear connecting a first spur gear provided on the rotation shaft of the motor unit and a second spur gear provided on the rotation shaft of the planetary gear reduction unit, a stepping motor unit and a planetary gear reduction unit; And a housing that accommodates in parallel.

このギヤドステッピングモータは、ステッピングモータ部と遊星ギア減速部との組み合わせからなり、ステッピングモータ部を採用することで、フォトセンサなどの回転角度センサやトルクリミッタなどを利用することなく、正確な回転角度制御が可能になる。さらに、ステッピングモータ部の回転軸の回転軸線に対して遊星ギア減速部の回転軸線を並設させ、ステッピングモータ部と遊星ギア減速部とを筐体内で並置させることによって、小型化を図りつつ省スペース化を可能にし、組み込みが予定されている機器（モバイル通信機器など）の小型化を促進させることができる。さらに、ステッピングモータ部の回転軸に設けられた第１の平歯車と、遊星ギア減速部の回転軸に設けられた第２の平歯車とを減速２段平歯車で連結することにより、減速２段平歯車によっても減速が可能になり、遊星ギア減速部内での減速段数又は減速比を減らすことでき、小型化に寄与する。   This geared stepping motor consists of a combination of a stepping motor unit and a planetary gear reduction unit. By adopting a stepping motor unit, accurate rotation can be achieved without using a rotation angle sensor such as a photo sensor or a torque limiter. Angle control becomes possible. Furthermore, the rotation axis of the planetary gear reduction unit is arranged in parallel with the rotation axis of the rotation axis of the stepping motor unit, and the stepping motor unit and the planetary gear reduction unit are juxtaposed in the housing, thereby reducing the size and reducing the size. Space can be reduced, and downsizing of devices (such as mobile communication devices) scheduled to be incorporated can be promoted. Further, the first spur gear provided on the rotation shaft of the stepping motor unit and the second spur gear provided on the rotation shaft of the planetary gear reduction unit are connected by a reduction two-step spur gear, thereby reducing the two-speed reduction gear. The gear can also reduce the speed, and the number of reduction stages or the reduction ratio in the planetary gear reduction unit can be reduced, which contributes to downsizing.

また、ステッピングモータ部のケースは小判型に形成され、このケースには、遊星ギア減速部側及びこれに対向する側に矩形の開口部が設けられ、ケースの外壁は、開口部間を架け渡すように円弧状に形成され、筐体には、遊星ギア減速部側に対向する側の開口部に対応して切欠き部が設けられていると好適である。   Further, the case of the stepping motor part is formed in an oval shape, and this case is provided with a rectangular opening on the planetary gear reduction part side and the side facing this, and the outer wall of the case bridges between the openings. It is preferable that the housing is provided with a notch corresponding to the opening on the side facing the planetary gear reduction portion.

このように、小判型のケースには、遊星ギア減速部側に矩形の開口部が設けられているので、ケースにおいて、遊星ギア減速部側を容易に切り詰めることができ、ステッピングモータ部を遊星ギア減速部に近づけることができる。さらに、小判型のケースには、遊星ギア減速部側に対向する側にも矩形の開口部が設けられているので、ケースにおいて、遊星ギア減速部側に対向する側を容易に切り詰めることができ、ステッピングモータ部と遊星ギア減速部との並設方向におけるギヤドステッピングモータの全長を短くすることができる。従って、このような開口部をもったステッピングモータ部の採用によっても、ギヤドステッピングモータの小型化が図られている。さらに、筐体に設けられた切欠き部により、筐体において遊星ギア減速部側に対向する側を容易に切り詰めることができるので、ステッピングモータ部と遊星ギア減速部との並設方向における筐体の全長を短くすることができ、ギヤドステッピングモータの小型化が図られている。   As described above, the oval case is provided with a rectangular opening on the planetary gear reduction unit side, so that the planetary gear reduction unit side can be easily cut off in the case, and the stepping motor unit is connected to the planetary gear unit. It can be brought closer to the deceleration part. In addition, since the oval case is provided with a rectangular opening on the side facing the planetary gear reduction unit, the side facing the planetary gear reduction unit can be easily cut off. The total length of the geared stepping motor in the direction in which the stepping motor unit and the planetary gear reduction unit are arranged side by side can be shortened. Therefore, downsizing of the geared stepping motor is also achieved by adopting the stepping motor portion having such an opening. Furthermore, since the notch provided in the housing can easily cut off the side of the housing that faces the planetary gear reduction portion, the housing in the direction in which the stepping motor portion and the planetary gear reduction portion are arranged side by side. Thus, the geared stepping motor can be downsized.

本発明によれば、小型化を図りつつ省スペース化を可能にし、組込みが予定されている機器の小型化を促進させることができる。   According to the present invention, it is possible to save space while achieving downsizing, and it is possible to promote downsizing of a device that is scheduled to be incorporated.

以下、図面を参照しつつ本発明に係るギヤドステッピングモータの好適な実施形態について詳細に説明する。   Hereinafter, a preferred embodiment of a geared stepping motor according to the present invention will be described in detail with reference to the drawings.

図１に示すように、カメラ付き携帯電話１は、操作部本体２とディスプレー本体３とがヒンジ部４を介して開閉動作可能に連結されている。そして、ディスプレー本体３には、回転可能なカメラ回転部５が設けられている。このカメラ回転部５内には、レンズ等の光学系、ＣＭＯＳやＣＣＤ等の撮像素子が収容されている。なお、カメラ回転部５には絞り装置やシャッタ装置が組み付けられている場合もある。このカメラ回転部５は、小型のギヤドステッピングモータ１０によって所定角度範囲内を回転する。そして、ギヤドステッピングモータ１０に供給されるパルス電流によって、カメラ回転部５は任意の角度で停止させることができる。さらに、ヒンジ部４にも、ディスプレー本体３を電動駆動させるための小型のギヤドステッピングモータ１０が設けられている。なお、このようなカメラ回転部５は、携帯電話に利用される他、モバイル通信装置の例えばＰＤＡ（Personal Digital Assistance）にも利用されている。   As shown in FIG. 1, in a camera-equipped mobile phone 1, an operation unit main body 2 and a display main body 3 are connected via a hinge unit 4 so as to be opened and closed. The display body 3 is provided with a rotatable camera rotating section 5. The camera rotation unit 5 accommodates an optical system such as a lens and an image sensor such as a CMOS or CCD. There may be a case where an aperture device or a shutter device is assembled to the camera rotation unit 5. The camera rotating unit 5 is rotated within a predetermined angle range by a small geared stepping motor 10. The camera rotation unit 5 can be stopped at an arbitrary angle by the pulse current supplied to the geared stepping motor 10. Further, the hinge unit 4 is also provided with a small geared stepping motor 10 for electrically driving the display body 3. Such a camera rotation unit 5 is used not only for a mobile phone but also for a mobile communication device such as a PDA (Personal Digital Assistance).

図２及び図３に示しように、ギヤドステッピングモータ１０は、直径約５〜１０ｍｍ程度で小型に属するＰＭ型のステッピングモータ部１１を備え、このステッピングモータ部１１は、積層されたＡ相スタック１２とＢ相スタック２２とで構成されている。Ａ相スタック１２は、ヨークをなす小判型の金属ケース１４を有している。このケース１４内には、Ｎ極とＳ極とが交互に着磁された多極のロータが収容され、ロータには、回転軸線Ｌ１上に延在する回転軸１６が固定されている。   As shown in FIGS. 2 and 3, the geared stepping motor 10 includes a PM type stepping motor unit 11 having a diameter of about 5 to 10 mm and belonging to a small size. The stepping motor unit 11 includes a stacked A-phase stack. 12 and a B-phase stack 22. The A-phase stack 12 has an oval metal case 14 that forms a yoke. The case 14 accommodates a multipolar rotor in which N poles and S poles are alternately magnetized, and a rotating shaft 16 extending on the rotation axis L1 is fixed to the rotor.

Ａ相スタック１２側において、ロータの周囲には、外側から内側に延びる磁極歯と内側から外側に延びる磁極歯とが交互に配置され、ロータは、磁極歯のピッチと同じピッチで着磁されている。さらに、磁極歯の周囲には、ボビンに巻回されたコイル１７が配置され、このコイル１７は、ケース１４に固定された端子台１８の各端子１８ａに接続されている。   On the A-phase stack 12 side, magnetic pole teeth extending from the outside to the inside and magnetic pole teeth extending from the inside to the outside are alternately arranged around the rotor, and the rotor is magnetized at the same pitch as the pitch of the magnetic pole teeth. Yes. Further, a coil 17 wound around a bobbin is disposed around the magnetic pole teeth, and this coil 17 is connected to each terminal 18 a of a terminal block 18 fixed to the case 14.

同様に、Ｂ相スタック２２は、ヨークをなす小判型の金属ケース２４を有している。このケース２４内には、Ｎ極とＳ極とが交互に着磁された多極のロータが収容され、ロータには、回転軸１６が固定されている。Ｂ相スタック２２側において、ロータの周囲には、外側から内側に延びる磁極歯と内側から外側に延びる磁極歯とが交互に配置され、ロータは、磁極歯のピッチと同じピッチで着磁されている。   Similarly, the B phase stack 22 has an oval metal case 24 that forms a yoke. The case 24 accommodates a multipolar rotor in which N poles and S poles are alternately magnetized, and a rotating shaft 16 is fixed to the rotor. On the B-phase stack 22 side, magnetic pole teeth extending from the outside to the inside and magnetic pole teeth extending from the inside to the outside are alternately arranged around the rotor, and the rotor is magnetized at the same pitch as the pitch of the magnetic pole teeth. Yes.

さらに、磁極歯の周囲には、ボビンに巻回されたコイル２７が配置され、このコイル２７は、ケース２４に固定された端子台２８の各端子２８ａに接続されている。なお、Ａ相スタック１２側の磁極歯に対してＢ相スタック２２側の磁極歯は、１／４ピッチずらされている。   Further, a coil 27 wound around a bobbin is disposed around the magnetic pole teeth, and this coil 27 is connected to each terminal 28 a of a terminal block 28 fixed to the case 24. The magnetic pole teeth on the B phase stack 22 side are shifted by 1/4 pitch with respect to the magnetic pole teeth on the A phase stack 12 side.

このように構成されたステッピングモータ部１１は、樹脂の筐体３０内に収容され、図３及び図４に示すように、筐体３０内には、ステッピングモータ部１１に並置された遊星ギア減速部３１が収容されている。この遊星ギア減速部３１は、ステッピングモータ部１１の回転軸線Ｌ１に並設された回転軸線Ｌ２上に位置する第１段目の太陽軸３２を有している。この太陽軸３２には、回転軸線Ｌ２上に位置する回転軸３２ａが設けられ、この回転軸３２ａは、筐体３０に設けられた軸受凹部３０ａ内に差し込まれている。   The stepping motor unit 11 configured as described above is accommodated in a resin housing 30 and, as shown in FIGS. 3 and 4, the planetary gear reduction gears juxtaposed with the stepping motor unit 11 are disposed in the housing 30. The part 31 is accommodated. The planetary gear speed reduction unit 31 has a first stage sun shaft 32 located on a rotation axis L2 provided in parallel with the rotation axis L1 of the stepping motor unit 11. The sun shaft 32 is provided with a rotation shaft 32 a located on the rotation axis L <b> 2, and the rotation shaft 32 a is inserted into a bearing recess 30 a provided in the housing 30.

この第１段目の太陽軸３２には太陽歯車３３が一体に形成され、この太陽歯車３３には、３個数の遊星歯車３４が噛合する。各遊星歯車３４は、キャリア３６に回転自在に取付けられると共に、筐体３０の内面に一体成形された固定リングギア３７に噛合されている。このキャリア３６には、回転軸線Ｌ２上に位置する第２段目の太陽軸３８が一体に形成され、第２段目の太陽軸３８には、太陽歯車３９が一体に形成され、この太陽歯車３９には、３個数の遊星歯車４０が噛合する。   A sun gear 33 is formed integrally with the first stage sun shaft 32, and three planetary gears 34 mesh with the sun gear 33. Each planetary gear 34 is rotatably attached to the carrier 36 and meshed with a fixed ring gear 37 integrally formed on the inner surface of the housing 30. The carrier 36 is integrally formed with a second-stage sun shaft 38 positioned on the rotation axis L2, and the second-stage sun shaft 38 is integrally formed with a sun gear 39. 39 is engaged with three planetary gears 40.

各遊星歯車４０は、キャリア４１に回転自在に取付けられると共に、筐体３０の内面に一体成形された固定リングギア３７に噛合されている。このキャリア４１には出力軸４３が一体に成形され、出力軸４３は、筐体３０に固定された軸受４４によって支持されている。この軸受４４は、オイルを含浸させないドライタイプの銅焼結材によって形成されると共に、筐体３０における遊星ギア減速部３１の蓋部として機能している。キャリア４１の中央には、回転軸線Ｌ２上に位置する軸受凹部４１ａが設けられ、この軸受凹部４１ａ内には、第２段目の太陽軸３８から突出する支軸３８ａが挿入されている。   Each planetary gear 40 is rotatably attached to the carrier 41 and meshed with a fixed ring gear 37 integrally formed on the inner surface of the housing 30. An output shaft 43 is formed integrally with the carrier 41, and the output shaft 43 is supported by a bearing 44 fixed to the housing 30. The bearing 44 is formed of a dry-type copper sintered material that is not impregnated with oil, and also functions as a lid portion of the planetary gear reduction unit 31 in the housing 30. A bearing recess 41a located on the rotation axis L2 is provided at the center of the carrier 41, and a support shaft 38a protruding from the second stage sun shaft 38 is inserted into the bearing recess 41a.

このような遊星ギア減速部３１とステッピングモータ部１１とは、筐体３０内で並置され、ステッピングモータ部１１の回転軸１６には第１の平歯車５０が設けられ、遊星ギア減速部３１における太陽軸３２の回転軸３２ａには第２の平歯車５１が一体に形成されている。第１の平歯車５０と第２の平歯車５１との間には減速２段平歯車５３が配置され、この減速２段平歯車５３は、遊星ギア減速部３１とステッピングモータ部１１との間に位置する筐体３０の隔壁３０ｂに設けられた軸部３０ｃによって回転自在に支持されている。そして、減速２段平歯車５３の下段側の大平歯車５３ａは、第１の平歯車５０に噛合し、減速２段平歯車５３の上段側の小平歯車５３ｂは、第２の平歯車５１に噛合し、これによって、減速が達成されている。   The planetary gear reduction unit 31 and the stepping motor unit 11 are juxtaposed in the housing 30, and the first spur gear 50 is provided on the rotation shaft 16 of the stepping motor unit 11. A second spur gear 51 is integrally formed on the rotating shaft 32 a of the sun shaft 32. A reduction two-stage spur gear 53 is disposed between the first spur gear 50 and the second spur gear 51, and the reduction two-stage spur gear 53 is positioned between the planetary gear reduction unit 31 and the stepping motor unit 11. The shaft 30c provided in the partition wall 30b of the housing 30 is rotatably supported. The lower spur gear 53a on the lower stage side of the reduction two-stage spur gear 53 meshes with the first spur gear 50, the small spur gear 53b on the upper stage side of the reduction two-stage spur gear 53 meshes with the second spur gear 51, As a result, deceleration is achieved.

なお、ギヤドステッピングモータ１０を組み立てるにあたって、遊星ギア減速部３１の前述した種々の歯車、第２の平歯車５１及び減速２段平歯車５３は、筐体３０の底部に設けられた底蓋３０ｄを外した状態で、筐体３０の底側から軸部及び軸受部に挿入可能になっており、簡単に筐体３０内に装填できる。そして、遊星ギア減速部３１及び平歯車５０，５１，５３を全て樹脂にすることで、低騒音性を実現し、潤滑材にフッ素系の半固形潤滑材を利用することで、フリクションの安定性や組立て易さを可能にしている。   In assembling the geared stepping motor 10, the above-described various gears of the planetary gear reduction unit 31, the second spur gear 51 and the reduction two-stage spur gear 53 are attached to the bottom cover 30 d provided at the bottom of the housing 30. In the removed state, it can be inserted into the shaft portion and the bearing portion from the bottom side of the housing 30 and can be easily loaded into the housing 30. The planetary gear speed reduction unit 31 and the spur gears 50, 51, 53 are all made of resin, so that low noise performance is achieved, and by using a fluorine-based semi-solid lubricant as the lubricant, the stability of friction is improved. And ease of assembly.

このように、ギヤドステッピングモータ１０は、並設されたステッピングモータ部１１と遊星ギア減速部３１との組み合わせからなり、ステッピングモータ部１１を採用することで、フォトセンサなどの回転角度センサやトルクリミッタなどを利用することなく、正確な回転角度制御が可能になる。   As described above, the geared stepping motor 10 includes a combination of the stepping motor unit 11 and the planetary gear reduction unit 31 arranged side by side. By adopting the stepping motor unit 11, a rotation angle sensor such as a photosensor or torque Accurate rotation angle control is possible without using a limiter or the like.

さらに、ステッピングモータ部１１の回転軸１６の回転軸線Ｌ１に対して遊星ギア減速部３１の回転軸線Ｌ２を並設させ、ステッピングモータ部１１と遊星ギア減速部３１とを筐体３０内で並置させることによって、ギヤドステッピングモータ１０の小型化を図りつつ省スペース化を可能にし、組み込みが予定されているモバイル通信機器（例えば携帯電話やＰＤＡなど）の小型化を促進させることができる。   Further, the rotation axis L2 of the planetary gear reduction unit 31 is juxtaposed with the rotation axis L1 of the rotation shaft 16 of the stepping motor unit 11, and the stepping motor unit 11 and the planetary gear reduction unit 31 are juxtaposed in the housing 30. As a result, the geared stepping motor 10 can be reduced in space while being reduced in size, and downsizing of mobile communication devices (for example, mobile phones and PDAs) scheduled to be incorporated can be promoted.

さらに、ステッピングモータ部１１の回転軸１６に設けられた第１の平歯車５０と、遊星ギア減速部３１における太陽軸３２の回転軸３２ａに設けられた第２の平歯車５１とを減速２段平歯車５３で連結することにより、遊星ギア減速部３１以外でも減速が可能になり、遊星ギア減速部３１内での減速段数又は減速比を減らすことができ、小型化に寄与する。また、ギヤドステッピングモータ１０の減速比を所定の値に設定することで、出力軸４３は、手動によって正転及び逆転を可能している。   Further, the first spur gear 50 provided on the rotating shaft 16 of the stepping motor unit 11 and the second spur gear 51 provided on the rotating shaft 32a of the sun shaft 32 in the planetary gear speed reducing unit 31 are reduced by two-stage flat gears. By connecting with the gear 53, it is possible to reduce the speed other than the planetary gear reduction unit 31, and the number of reduction stages or the reduction ratio in the planetary gear reduction unit 31 can be reduced, which contributes to downsizing. Further, by setting the reduction ratio of the geared stepping motor 10 to a predetermined value, the output shaft 43 can be rotated forward and reverse manually.

次に、ステッピングモータ部１１と遊星ギア減速部３１とを筐体３０内で並置したギヤドステッピングモータ１０の更なる小型化の工夫について説明する。   Next, a device for further downsizing the geared stepping motor 10 in which the stepping motor unit 11 and the planetary gear reduction unit 31 are juxtaposed in the housing 30 will be described.

図２、図３、図５及び図６に示すように、回転軸線Ｌ１に垂直な断面が小判型のステッピングモータ部１１において、Ａ相スタック１２の小判型の金属ケース１４には、遊星ギア減速部側（内側）Ｐ及びこれに対向する側（外側）Ｒに矩形の開口部６０ａ，６０ｂが設けられ、ケース１４の外壁１４ａは、開口部６０ａ，６０ｂ間を架け渡すように円弧状に形成されている。同様に、Ｂ相スタック２２の小判型の金属ケース２４には、遊星ギア減速部側Ｐ及びこれに対向する側Ｒに矩形の開口部６１ａ，６１ｂが設けられ、ケース２４の外壁２４ａは、開口部６１ａ，６１ｂ間を架け渡すように円弧状に形成されている。そして、遊星ギア減速部側Ｐにおいて、開口部６０ａと開口部６１ａとが回転軸線Ｌ１方向に並設され、遊星ギア減速部側Ｐに対向する側Ｒにおいて、開口部６０ｂと開口部６１ｂとが回転軸線Ｌ１方向に並設されている。   As shown in FIGS. 2, 3, 5, and 6, in the oval type stepping motor unit 11 having a cross section perpendicular to the rotation axis L <b> 1, the oval metal case 14 of the A phase stack 12 has a planetary gear reduction. Rectangular openings 60a and 60b are provided on the part side (inner side) P and the opposite side (outer side) R, and the outer wall 14a of the case 14 is formed in an arc shape so as to bridge between the openings 60a and 60b. Has been. Similarly, the oval metal case 24 of the B-phase stack 22 is provided with rectangular openings 61a and 61b on the planetary gear reduction part side P and the side R facing the planetary gear reduction part side P, and the outer wall 24a of the case 24 is opened. It is formed in an arc shape so as to bridge between the portions 61a and 61b. Then, on the planetary gear reduction part side P, the opening part 60a and the opening part 61a are arranged in parallel in the direction of the rotation axis L1, and on the side R facing the planetary gear reduction part side P, the opening part 60b and the opening part 61b are provided. They are arranged in parallel in the direction of the rotation axis L1.

このように、小判型のケース１４，２４には、遊星ギア減速部側Ｐに矩形の開口部６０ａ，６１ａが設けられているので、ケース１４，２４において、遊星ギア減速部側Ｐを容易に切り詰めることができ、回転軸線Ｌ１と回転軸線Ｌ２との間隔を狭めて、ステッピングモータ部１１を遊星ギア減速部３１に近づけることができる。さらに、小判型のケース１４，２４には、遊星ギア減速部側Ｐに対向する側Ｒに矩形の開口部６０ｂ，６１ｂが設けられているので、ケース１４，２４において、遊星ギア減速部側Ｐに対向する側Ｒを容易に切り詰めることができ、ステッピングモータ部１１と遊星ギア減速部３１との並設方向におけるギヤドステッピングモータ１０の寸法を短くすることができる。従って、このような開口部６０ａ，６０ｂ，６１ａ，６１ｂをもったステッピングモータ部１１の採用によっても、ギヤドステッピングモータ１０の小型化が図られている。   As described above, since the rectangular openings 60a and 61a are provided in the planetary gear reduction part side P in the oval cases 14 and 24, the planetary gear reduction part side P is easily provided in the cases 14 and 24. The stepping motor unit 11 can be brought closer to the planetary gear reduction unit 31 by narrowing the interval between the rotation axis L1 and the rotation axis L2. Further, since the oblong-shaped cases 14 and 24 are provided with rectangular openings 60b and 61b on the side R facing the planetary gear reduction part side P, the planetary gear reduction part side P in the cases 14 and 24 is provided. Can be easily cut off, and the size of the geared stepping motor 10 in the direction in which the stepping motor unit 11 and the planetary gear reduction unit 31 are arranged side by side can be shortened. Therefore, downsizing of the geared stepping motor 10 is also achieved by adopting the stepping motor unit 11 having such openings 60a, 60b, 61a, 61b.

さらに、筐体３０には、遊星ギア減速部側Ｐに対向する側Ｒの開口部６０ｂ，６１ｂに対応して矩形の切欠き部６３が設けられている。このような切欠き部６３の採用により、筐体３０において遊星ギア減速部側Ｐに対向する側Ｒを容易に切り詰めることができるので、ステッピングモータ部１１と遊星ギア減速部３１との並設方向における筐体３０の長さを短くすることができる。   Further, the housing 30 is provided with a rectangular notch 63 corresponding to the openings 60b and 61b on the side R facing the planetary gear speed reduction part side P. By adopting such a notch portion 63, the side R of the housing 30 that faces the planetary gear reduction portion side P can be easily cut off, so that the stepping motor portion 11 and the planetary gear reduction portion 31 are arranged side by side. The length of the housing 30 can be shortened.

このように、様々な工夫によって小型化されたギヤドステッピングモータ１０は、ステッピングモータ部１１と遊星ギア減速部３１との並設方向における全長は、１２．５ｍｍであり、幅は７ｍｍである。   Thus, the geared stepping motor 10 reduced in size by various devices has a total length of 12.5 mm and a width of 7 mm in the direction in which the stepping motor unit 11 and the planetary gear reduction unit 31 are juxtaposed.

本発明に係るギヤドステッピングモータを適用した携帯電話を示す斜視図である。It is a perspective view which shows the mobile phone to which the geared stepping motor according to the present invention is applied. 本発明に係るギヤドステッピングモータの一実施形態を示す斜視図である。1 is a perspective view showing an embodiment of a geared stepping motor according to the present invention. 図２に示したギヤドステッピングモータの断面図である。It is sectional drawing of the geared stepping motor shown in FIG. ギヤドステッピングモータに適用したギア列を示す平面図である。It is a top view which shows the gear train applied to the geared stepping motor. 本発明に係るギヤドステッピングモータの斜視図である。1 is a perspective view of a geared stepping motor according to the present invention. ギヤドステッピングモータの平面図である。It is a top view of a geared stepping motor.

符号の説明Explanation of symbols

１…カメラ付き携帯電話、１０…ギヤドステッピングモータ、１１…ステッピングモータ部、１４，２４…ケース、１６…回転軸、３０…筐体、３１…遊星ギア減速部、３２ａ…回転軸、５０…第１の平歯車、５１…第２の平歯車、５３…減速２段平歯車、６０ａ，６０ｂ，６１ａ，６１ｂ…開口部、６３…切欠き部、Ｌ１，Ｌ２…回転軸線、Ｐ…遊星ギア減速部側、Ｒ…遊星ギア減速部側に対向する側。
DESCRIPTION OF SYMBOLS 1 ... Camera-equipped mobile phone, 10 ... Geared stepping motor, 11 ... Stepping motor part, 14, 24 ... Case, 16 ... Rotating shaft, 30 ... Housing, 31 ... Planetary gear reduction part, 32a ... Rotating shaft, 50 ... 1st spur gear, 51 ... 2nd spur gear, 53 ... 2 speed reduction spur gear, 60a, 60b, 61a, 61b ... opening, 63 ... notch, L1, L2 ... rotation axis, P ... planetary gear reduction Part side, R: The side facing the planetary gear reduction part side.

Claims (2)

回転軸が所定角度でステップするステッピングモータ部と、
前記ステッピングモータ部の前記回転軸の回転軸線に対して並設された回転軸線を有する遊星ギア減速部と、
前記ステッピングモータ部の前記回転軸に設けられた第１の平歯車と前記遊星ギア減速部の回転軸に設けられた第２の平歯車とを連結する減速２段平歯車と、
前記ステッピングモータ部と前記遊星ギア減速部とを並置して収容する筐体と、を備えたことを特徴とするギヤドステッピングモータ。 A stepping motor unit in which the rotation shaft steps at a predetermined angle;
A planetary gear reduction unit having a rotation axis lined in parallel to the rotation axis of the rotation axis of the stepping motor unit;
A reduction two-stage spur gear connecting a first spur gear provided on the rotation shaft of the stepping motor unit and a second spur gear provided on the rotation shaft of the planetary gear reduction unit;
A geared stepping motor, comprising: a housing that houses the stepping motor unit and the planetary gear reduction unit side by side. 前記ステッピングモータ部のケースは小判型に形成され、前記ケースには、前記遊星ギア減速部側及びこれに対向する側に矩形の開口部が設けられ、前記ケースの外壁は、前記開口部間を架け渡すように円弧状に形成され、前記筐体には、前記遊星ギア減速部側に対向する側の前記開口部に対応して切欠き部が設けられていることを特徴とする請求項１記載のギヤドステッピングモータ。
The case of the stepping motor portion is formed in an oval shape, and the case is provided with a rectangular opening on the planetary gear reduction portion side and the opposite side, and the outer wall of the case is between the openings. 2. A circular arc is formed so as to be bridged, and the casing is provided with a notch corresponding to the opening on the side facing the planetary gear reduction part. The geared stepping motor described.
JP2005349539A 2005-12-02 2005-12-02 Geared stepping motor Active JP4891600B2 (en)

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JP2005349539A JP4891600B2 (en) 2005-12-02 2005-12-02 Geared stepping motor
CN2006101639427A CN1976174B (en) 2005-12-02 2006-11-29 Gear-driven step motor and communication device using same
KR1020060120116A KR101121233B1 (en) 2005-12-02 2006-11-30 Geared stepping motor and communication device using the same
TW095144845A TWI393328B (en) 2005-12-02 2006-12-01 Gear stepper motor and communication machine using it

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KR20070058336A (en) 2007-06-08

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